// Ninf-G-XX, ver. 0.1
// Copyright 2011 National Institute of Advanced Industrial Science and Technology
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
//     http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/*
 * ByteArrayInputStream.hpp
 *
 *  Created on: Jan 29, 2009
 *      Author: nakada
 */

#ifndef BYTEARRAYINPUTSTREAM_HPP_
#define BYTEARRAYINPUTSTREAM_HPP_
#include <stdlib.h>
#include "InputStream.hpp"

namespace ninf {

namespace lib {

class ByteArrayInputStream: public ninf::lib::InputStream {
  const char * array;
  int current;
  int size;

public:
  ByteArrayInputStream(const char * array, int size);
  virtual ~ByteArrayInputStream();
  /**
   * read a single byte
   * if it encounters EOF returns -1
   * if it encounters some error throws exception
   */
  int read();

  /*
   * read byte array and stores it to val
   * it returns number of actually read bytes
   */
  int read(char * val, int offset, int len);


  /*
   * read byte array and stores it to val
   * keep tring to read specified length
   * returns non 0 if succuess, 0 if failed
   */
  int readFully(char * val, int offset, int len);


  /*
   * close underlying stream
   */
  void close();
};

}

}

#endif /* BYTEARRAYINPUTSTREAM_HPP_ */
